Excavating machinery



Oct. 26-, 1926. 1,604,639

JW. 6. FOGARTY EXCAVATING MACHINERY Filed Jan. 12 1925- 2 Sheets- Sheet 1 Oct. 26 1926.

J. G. FOGARTY EXCAVATING MACHINERY 2 Sheets-Sheet 2 Filed Jan. 12. 1925 INV 1v M ATTORNEY Patented Oct. 26, 1926. v

UNITED STATES PATENT oFFIcn.

JOHN Gr. FOGARTY, OF ROCHESTER, NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS, TO FRANKLIN H. SMITH, OF ROCHESTER, NEW YORK.

EXCAVA'IING MACHINERY.

Application filed January 12, 1925.

My invention relates to excavating machinery, and has for its object to improve the construction of machines of this class in a manner to increase their usefulness and efliciency and to afford a simple and durable construction capable of being manufactured at a comparatively small cost.

A further object of the invention is to provide improvements in the construction of the boom or bucket supporting means which will render the same more flexible and facilitate undercutting as well as permit of an increase in the range and effectiveness of the buckets in their scooping operations.

To these and other ends the invention resides in certain improvements and combinations of parts, all as will be hereinafter more fully described, the novel features be ing pointed out in the claims at the end of the specification.

In the drawings: I

Figure 1 is a diagrammatic side elevation of an excavating machine embodying the invention;

boom constructed in accordance with the mvention Figure 3 is a side elevation of the same;

Similar reference numerals throughout the several views indicate the same parts.

In the present construction 10 represents a cross beam and 11 a vertically disposed frame thereon forming in part, suitable means for supporting a turn table 12 and a mast 13 connected with the frame as in dicated at 14 in Figure 1.

A boom 15 is pivotedupon the turn table at 16 and an auxiliary boom 17 is also pivotally connected therewitln The upper end of the auxiliary boom may be connected with the mast 13 by any suitable means, such as that shown in Figure 1 and including the inner and outer pivotal frames 18 and 19 along with a suitable number of pulle s 20 and 21 and a hoisting cable 22. The com 15 is connected with the auxiliary boom by a pivotal frame 23, together with suit- Figure 2 is a plan view of an improved Serial No. 1,739.

accomplish the desired result by pivotally mounting at the outer end thereof -a suitable support or short boom section 27, adapted to swing or rock transversely'of the boom upon an axis in a plane substantially parallelwith the boom, as upon the pivot pin 28 extending through the brackets 29 and 30 and forming a pivotal connection between the relatively long and short sections of the boom. The two sections of the boom are additionally joined together at the opposite side from the pivot pin 28 by a second pin 31, anchored centrally of the boom in a bracket 32 rigid on the section 15, and extending through a slot 33 of a bracket 34 rigid on the section 27. In this way the two sections are mounted end to end and connected attheir opposite sides in a manner to successfully resist the strains of the loads to be lifted by the boom but also in a manner to permit the bucket holding section to rock or swing transversely to either side of the center of the boom so that the bucket, indicated generally at 35, may be. made to tilt upon the ground in a direction transversely of the boom. By thus tilting the bucket upon the ground it can be more effec tively urged or drawn into the earth, as by a downward and lateral or swinging movement of the boom, which has the effect of dragging the'cutting edges or teeth of the bucket into the material to be moved or excavated.

The bucket is suspended by suitable straps or links 36 pivotally connected preferably with a rotary head or carrier 37, which may be of the kind disclosed in my prior Patent No. 1,236,418 of August 14, 1917. The rotary carrier is pivotally connected with one or more arms 38 rigidly secured upon the pivotal sup ort 27, or other equivalent means. mounted upon and adapted to rock laterally of the boom. I

lVhile a rotary carrier of this kind forms a desirable support for the bucket it is not necessarily essential the present invention liq as the links 36 may be directly connected with the arms 38 if desired or other suitable means provided for .the same purpose. Suitable upper and lower pulleys 39 and 40 are connected respectively with the rotary carrier 37 and the arms of the bucket and an operating cable ll is extended around the pulleys and upwardly bet-ween guide wheels 42 as shown in Figure 1 and thence over a sheave {i3 mounted upon the outer end of the pivotal member 27.

Ihe cable for closing the bucket is preferably carried justabove and substantially parallel with the boom 15 and .under a .pul-

* 'ley 4:42 .at the inner end of the boom, the pulley being mounted between a pair of swinging arms 45 carried preferably by the pivot bolt 46 of the boom, as shown in Figures 2 and 3. From the pulley 44: the cableis preferably carried upwardly around a pulley 47 and thence downwardly under another pulley 48 and to the drum, not shown. By extending the operating cable for the bucket around a pulley 44 located close to the pivot point of the boom, I provide an arrangement which serves to prevent undue slackening of the cable during the raising of the boom 15 to elevate the bucket. This arrangement is of considerable advantage since it permits the boom to be raised, with a minimum movement of the drum for winding the cable (ll after the bucket has been closed.

-While the pivotal member 27 for effecting a tilting of the bucket is shown as an end to end extension of the boom 15, it will be understood that the invention is not limited to this particular form of construction, since it is apparent that once given the broad idea of the invention, one skilled in the art can readily provide a different form ofconstruction for accomplishing the same results.

In the usual construction of excavating machines-of this kind the bucket is suspended from the boom in such a manner as to swing about an axis extending transversely of the boom, thus causing the bucket to swing in a plane parallel with the plane of the boom rather than in ,a plane extending transversely thereof. In the present construction the boom is designed not only to permit the bucket by reason of the-rotary carrier, to occupy any angular position with respect to the boom, which may be desired but also to permit the bucket to swing or have a rocking movement about an axis in a plane substantially parallel with the boom. Such a rocking movement of the bucket as stated above permits it to tilt in a direction transversely of the boom, upon engagement of the bucket with the ground. 7 The bucket can then be more effectively drawn or urged into the earth by a downward and lateral movement of the boom than in cases where it is simply urged straight down, in the old way, while in a true upright position, with all of its cutting members in engagement with the ground at the beginning of the scooping operation.

A very important advantage in the present construction is that it can be used to more readily efi'ect undercutting, as in the case of a bank or wall of earth and is par tiC-Lllarly advantgeous where it is necessary to operate the machine close to and in parallel relation with a wall 0t earth, or within relatively narrow or restricted limits, as is often necessary in excavating for the foundations of buildings, or in dredging ditches and the like. It is also particularly advantageous tor excavating on the side of a hill, as well as for inclined surfaces of any kind, due to the tfireedom of the bucket to tilt transversely of the boom in either direction, according to the position of the machine with respect to the slope on which the bucket is adapted to operate.

By allowing the bucket .to tilt transversely of the boom to a position substantially parallel with the inclined surface .to. be excavated and then swinging the boom downwardly and laterally in a direction toward the top of the incline, the effectiveness and usetulness of a machine .of this class is increased over other machines constructed in the usual manner.

I claim as my invention:

1. In an excavating machine. the combination with a boom, of a member rigidly connected with the outer end of the boom for a swinging movement about an axis in a plane substantially parallel with the boom, means connecting said member with the boom at a point removed from said axis adapted to support it while swinging upon the axis, and an excavating device depending from said member.

2. In an excavating machine, the combination with a boom, of a member rigidly connected with the outer end of the boom for a swinging movement about a pivot having an axis in a plane substantially parallel. with the boom, a rigid connection between the boom and said member permitting the latter to rock transversely of the boom while supporting the same, a bracket pivotally con nected with said member and an excavating device pivotally carried by said bracket.

3. In an excavating machine, the combination with a boom, of a member pivotally connected at one side with the outer end of the boom for a swinging movement thereon about an axis in a plane substantially parallel with the boom, means connecting the opposite side of said member with the boom, said means being adapted to slide upon the boom to permit said member to rock upon said axis transversely of the boom, a second member pivoted upon the first, and an excavating device depending from said second member.

4. In an excavating machine, the combination with a boom, of a support, oppositely disposed connections between said support and the boom, one of which comprises a pivot with its axis in a plane substantially parallel to the boom and the other forming a freely shittable connection permitting said support to'rock about said axis While supporting the same, and a bucket depending from said support.

5. In an excavating machine, the combination with a boom, of a support, oppositely disposed connections between said support and the boom, one of which comprises a pivot with its axis in a plane substantially parallel to the boom and the other forming a freely shittable connection permitting said support to rock about said axis While supporting the same, a carrier rotatably connected with said support and a bucket depending from said carrier.

6. In an excavating machine, the combination with a boom, of a support, oppositely disposed connections between said support and the boom, one of which comprises a pivot with its axis in a plane substantially parallel to the boom and the other forming a shiftable connection permitting said support to rock about said axis while supporting the same, a bracket pivoted upon said support, a carrier rotatably mounted upon. said bracket and a bucket depending from said carrier.

7. In an excavating machine, the combination with a boom, of a bucket support and oppositely disposed connections between said support and the boom, one of which comprises a pivot member with its axis in a plane substantially parallel to the boom, and the other forming a shittable bolt permitting said bucket support to rock about said axis.

8. In an excavating machine, the combination with a boom, of a bucket support and oppositely disposed connections between said support and the boom, one of which comprises a pivot member with its axis in a plane substantially parallel to the boom, and the other forming a shiitable bolt permitting said bucket support to rock about said axis,

a member mounted for movement about an.

mitting the outer section to rock upon said axis while supporting the same.

10. In a device of the class described, a boom comprising inner and outer sections, a pivot member connecting the sections, and a bolt connecting the sections at a point spaced from said pivot member and permitting the outer section to have a limited swinging movement upon said pivot member.

11. In a device of the class described, a boom comprising inner and outer sections, a pivot member connecting the sections, a bracket carried by one ofthe sections and connecting means upon the other section inter-engaging with the bracket to permit a limited swinging movement of the outer section upon the inner section.

12. In an excavating machine, the combi nation with a boom, of a member rigidly connected with the outer end of the boom for a si inging movement about a pivot have ing an axis in a plane substantially parallel with the boom, means connecting said memher with the boom and permitting it to swing upon said pivot transversely of the boom while supporting the same, a hinged bucket depending from said member, an operating cable for the bucket and a pivoted arm adjacent the inner end of the boom having a pulley adapted to hold the cable taut when the boom is raised. I

18. In an excavating machine, the combination with a boom, and means for raising and lowering the same, of a member rigidly connected with the outer end of the boom for a rocking movement about an axis parallel with the boom, a hinged bucket depending from said member, operating means for the bucket including a cable extending therefrom along one side of the boom, and means intermediate the ends of the cable located adjacent the pivot point of the boom and adapted to hold the cable taut when the boom is. raised.

14:- In an excavating machine, the combination with a boom and means for raising and lowering the same, of a hinged bucket depending from the outer end of the boom, operating means for the bucket including a cable extending therefrom along one side of the boom and a pulley adjacent the inner end of the boom adapted to receive the cable and to hold it taut when the boom is raised.

15. In a device of the class described, a boom comprising alined sections, one of which is pivotally mounted for a transverse swinging movement uponthe other, a longitudinally extending connection between the ends of the sections spaced from the pivotal axis thereof and-excavating means dependmg from said pivotally mounted sectlon.

JOHN G. FOGARTY. 

